I have found the roots of this problem, There will be hotfix released later next day.
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EDIT: Hotfix #6 Released.
SW3.Expansion.v0.6.1.9P Hotfix #6 Release
Download *Requires: MAIN,RESOURCES, 0.6.1.9P Update.
This Hotfix includes (as always) all the other Hotfix's contents, and this one in particular Fixes the crash you have experienced.
A new game is NOT neccesary (You must load a system BEFORE you enter the affected System, though)